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Stehr is believed to have arrived in Adelaide on Friday, after catching a bus from Mount Gambier.

The opposition blamed the state government for a delay in identifying Stehr.

Telstra has told 9NEWS they will review the failure. (9NEWS)

"The public have a right to know what this person looks like, where he might be and what he’s done," opposition spokesman Lee Odenwalder said.

The government has promised a system crash like Friday's win't happen again, but it gave that same pledge in May when there was a similar network failure; that meltdown sparked a review, but the findings have never been released.

"If we need to upgrade a system, then that’s exactly and precisely what we’ll do," Premier Steven Marshall said.